{"id":8141,"date":"2024-04-15T02:55:44","date_gmt":"2024-04-15T02:55:44","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=8141"},"modified":"2024-04-15T02:55:44","modified_gmt":"2024-04-15T02:55:44","slug":"if-the-general-ground-level-of-any-area-is-10-of-the-flying-height-the-principal-points-may-be-used-as-the-centers-of-radial-directions-for-small-scale-mapping-even-in-tilted-photograph-up-to-a-1a","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/if-the-general-ground-level-of-any-area-is-10-of-the-flying-height-the-principal-points-may-be-used-as-the-centers-of-radial-directions-for-small-scale-mapping-even-in-tilted-photograph-up-to-a-1a\/","title":{"rendered":"If the general ground level of any area is 10% of the flying height, the principal points may be used as the centers of radial directions for small scale mapping even in tilted photograph up to A. 1\u00c2\u00b0 B. 2\u00c2\u00b0 C. 3\u00c2\u00b0 D. 4\u00c2\u00b0"},"content":{"rendered":"<p>\r\n    <!-- Check if it's an AMP page -->\r\n            <!-- Non-AMP version -->\r\n        <div class=\"mcq-container\" data-quiz-id=\"quizState_6a99b551225c7\">\r\n                                            <div class=\"option\" data-option-key=\"option1\" data-is-correct=\"false\">\r\n                    1\u00c2\u00b0                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option2\" data-is-correct=\"true\">\r\n                    2\u00c2\u00b0                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option3\" data-is-correct=\"false\">\r\n                    3\u00c2\u00b0                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option4\" data-is-correct=\"false\">\r\n                    4\u00c2\u00b0                <\/div>\r\n                            \r\n            <!-- Feedback messages for non-AMP -->\r\n            <div class=\"feedback\" data-feedback=\"wrong\">Answer is Right!<\/div>\r\n            <div class=\"feedback\" data-feedback=\"right\">Answer is Wrong!<\/div>\r\n        <\/div>\r\n\r\n        <script>\r\n        document.addEventListener('DOMContentLoaded', function () {\r\n            var containers = document.querySelectorAll('.mcq-container');\r\n\r\n            containers.forEach(function(container) {\r\n                var options = container.querySelectorAll('.option');\r\n                var feedbackSelect = container.querySelector('[data-feedback=\"select\"]');\r\n                var feedbackWrong = container.querySelector('[data-feedback=\"wrong\"]');\r\n                var feedbackRight = container.querySelector('[data-feedback=\"right\"]');\r\n\r\n                options.forEach(function(option) {\r\n                    option.addEventListener('click', function() {\r\n                        var selectedOption = option.getAttribute('data-option-key');\r\n                        var isCorrect = option.getAttribute('data-is-correct') === 'true';\r\n\r\n                        \/\/ Remove previous selections\r\n                        options.forEach(function(opt) {\r\n                            opt.classList.remove('correct', 'incorrect');\r\n                        });\r\n\r\n                        \/\/ Add the correct\/incorrect class\r\n                        if (isCorrect) {\r\n                            option.classList.add('correct');\r\n                            feedbackRight.hidden = false;\r\n                            feedbackWrong.hidden = true;\r\n                        } else {\r\n                            option.classList.add('incorrect');\r\n                            feedbackRight.hidden = true;\r\n                            feedbackWrong.hidden = false;\r\n                        }\r\n\r\n                        \/\/ Hide select feedback\r\n                        feedbackSelect.hidden = true;\r\n                    });\r\n                });\r\n            });\r\n        });\r\n        <\/script>\r\n    \r\n    <!--more--><\/p>\n<p>The correct answer is $\\boxed{\\text{A}}$.<\/p>\n<p>The principal point is the intersection of the optical axis of the camera with the image plane. It is the center of the perspective projection of the object onto the image plane. The radial direction from the principal point <div class=\"youtube-subscribe-container\">\r\n        <a href=\"https:\/\/www.youtube.com\/channel\/UCNHT8lW-JmLC68rjBfZhdkg?sub_confirmation=1\" target=\"_blank\" class=\"youtube-subscribe-button\">\r\n            <span class=\"youtube-icon\">\r\n                <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 576 512\">\r\n                    <path d=\"M549.7 124.1c-6.3-23.7-24.8-42.3-48.3-48.6C458.8 64 288 64 288 64S117.2 64 74.6 75.5c-23.5 6.3-42 24.9-48.3 48.6-11.4 42.9-11.4 132.3-11.4 132.3s0 89.4 11.4 132.3c6.3 23.7 24.8 41.5 48.3 47.8C117.2 448 288 448 288 448s170.8 0 213.4-11.5c23.5-6.3 42-24.2 48.3-47.8 11.4-42.9 11.4-132.3 11.4-132.3s0-89.4-11.4-132.3zm-317.5 213.5V175.2l142.7 81.2-142.7 81.2z\"\/>\r\n                <\/svg>\r\n            <\/span>\r\n            Subscribe on YouTube\r\n        <\/a>\r\n    <\/div> to any point on the image plane is the line connecting the principal point to that point.<\/p>\n<p>The tilt of a photograph is the angle between the optical axis of the camera and the vertical. The tilt of a photograph can be measured <div class=\"telegram-channel-container\">\r\n        <a href=\"https:\/\/t.me\/pscnotes2025\" target=\"_blank\" class=\"telegram-channel-button\">\r\n            <span class=\"telegram-icon\">\r\n                <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 496 512\">\r\n                    <path fill=\"white\" d=\"M248,8C111,8,0,119,0,256s111,248,248,248s248-111,248-248S385,8,248,8z M362,177L320,367c-3,14-10,18-20,14l-56-41l-27,26 c-3,3-5,5-10,5l4-63L323,196c5-5-1-7-8-3l-98,62l-42-13c-9-3-10-9,2-14l162-63C351,160,365,164,362,177z\"\/>\r\n                <\/svg>\r\n            <\/span>\r\n            Join Our Telegram Channel\r\n        <\/a>\r\n    <\/div> in degrees.<\/p>\n<p>For small scale mapping, the principal points may be used as the centers of radial directions even in tilted photographs up to a tilt of 1\u00c2\u00b0. This is because the error introduced by using the principal points as the centers of radial directions is small for small scale mapping.<\/p>\n<p>For large scale mapping, the principal points should not be used as the centers of radial directions in tilted photographs. This is because the error introduced by using the principal points as the centers of radial directions is large for large scale mapping.<\/p>\n<p>The following is a brief explanation of each option:<\/p>\n<ul>\n<li>Option A: 1\u00c2\u00b0. This is the correct answer. The principal points may be used as the centers of radial directions even in tilted photographs up to a tilt of 1\u00c2\u00b0.<\/li>\n<li>Option B: 2\u00c2\u00b0. This is not the correct answer. The principal points should not be used as the centers of radial directions in tilted photographs with a tilt of 2\u00c2\u00b0 or more.<\/li>\n<li>Option C: 3\u00c2\u00b0. This is not the correct answer. The principal points should not be used as the centers of radial directions in tilted photographs with a tilt of 3\u00c2\u00b0 or more.<\/li>\n<li>Option D: 4\u00c2\u00b0. This is not the correct answer. The principal points should not be used as the centers of radial directions in tilted photographs with a tilt of 4\u00c2\u00b0 or more.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Join Our Telegram Channel Subscribe on YouTube<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[654],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v22.2 (Yoast SEO v23.3) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>If the general ground level of any area is 10% of the flying height, the principal points may be used as the centers of radial directions for small scale mapping even in tilted photograph up to A. 1\u00c2\u00b0 B. 2\u00c2\u00b0 C. 3\u00c2\u00b0 D. 4\u00c2\u00b0<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" 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